stiff legs.
the definition of the word maverick is horse with a horn
hind legs
The word isn't specifically for a horse's legs. But the way in which someone or something walks is called a gait.
Four legs. Horses have always had four legs.
Horseback riding.
An ambury is another word for an anbury, a spongy wart on the legs or flanks of a horse.
A flat surface of wood or similar with legs that you can eat off or study at.
Another word is crowhop.
The definition of the word bootlegger is originally a smuggler of liquor in the legs of boots, although it now means to make and sell as well as transport alcohol liquor, legally or illegally.
Relaxed or laid back.
The definition of the word "Obstacle" means to prevent or slow down an action, for example, hurdles and fences in horse racing slows down the horses progress.